对称型多输出齿轮马达的泄漏分析与容积效率

为了研究对称型多输出齿轮马达的泄漏与容积效率，通过对称型多输出齿轮马达的内部结构计算出内外马达不同连接方式下的几何排量，分析了马达的主要泄漏途径，通过建立泄漏的数学模型归纳不同连接下泄漏的一般表达式；同时搭建试验平台测试对称型多输出齿轮马达的容积效率. 研究结果表明:当马达的进出口压力由0.9 MPa增加至5.9 MPa时，内马达工作时容积效率由94.2%下降至80.2%，外马达容积效率由92.5%下降至73.6%，内外马达同时工作时容积效率由88.8%下降至63.2%，差动连接时容积效率由86.0%下降至62.7%；当进出口压差为5.9 MPa时，内马达单独工作容积效率最高为80.2%，差动连接下马达的容积效率最低为62.7%. 

Leakage Analysis and Volumetric Efficiency of Symmetrical Multiple Output Gear Motors

In order to study the leakage and volumetric efficiency of a symmetrical multi-output geared motor, the geometric displacements of the internal and external motors under different connection modes were calculated based on the internal structure of the symmetric multi-output gear motor. The main leakage paths of the motor were analyzed. By establishing a mathematical model of the leakage, general expressions of leakage under different connections were summarized. At the same time, an experimental platform was built to test the volumetric efficiency of the symmetrical multi-output geared motor. The results show that when the inlet and outlet pressure of the motor increase from 0.9 MPa to 5.9 MPa, the volumetric efficiency of the internal motor decreases from 94.2% to 80.2%, and the volumetric efficiency of the external motor decreases from 92.5% to 73.6%. The efficiency drops from 88.8% to 63.2%, and the volumetric efficiency decreases from 86.0% to 62.7% during differential connection. When the pressure difference between the inlet and outlet is 5.9 MPa, the volumetric efficiency of the internal motor alone is 80.2%, and the volumetric efficiency of the motor is 62.7%.